Help, please!

Hi. I am 22 and have unprotected sex with my long term BF often. I am having some symptoms and I really seen someone's advice... Please. I'll try to provide as much info as I can.
I am having UTI symptoms, cold symptoms, dizyness, and having trouble sleeping. I took a pregnancy test Saturday and it came back negative. I am really sensitive to different smells... My breasts are a little tender.